Search results for "hsh"
showing 6 items of 6 documents
Measuring Observable Quantum Contextuality
2016
Contextuality is a central property in comparative analysis of classical, quantum, and supercorrelated systems. We examine and compare two well-motivated approaches to contextuality. One approach (“contextuality-by-default”) is based on the idea that one and the same physical property measured under different conditions (contexts) is represented by different random variables. The other approach is based on the idea that while a physical property is represented by a single random variable irrespective of its context, the joint distributions of the random variables describing the system can involve negative (quasi-)probabilities. We show that in the Leggett-Garg and EPR-Bell systems, the two …
La disputa fronteriza entre India y China: origen y evolución de la controversia
2008
Con la emergencia de la India independiente y de la China maoísta a mediados del siglo pasado, los dos nuevos gobiernos de Delhi y Pekín comenzaron a convivir en un marco de armonía bajo los principios de coexistencia pacífica y una política de hermandad entre ambos pueblos, conocida como Hindi-Chini Bhai Bhai. Sin embargo, a pesar de estas actitudes amistosas iniciales, la herencia colonial británica en la India y las consecuencias de la anexión china del territorio tibetano, vinieron a desestabilizar este equilibrio, con el enfrentamiento de las pretensiones soberanistas de ambos Estados emergentes sobre distintas zonas fronterizas.El análisis del origen y la evolución de la controvertida…
Populetum pamiricae ass. nova – an endemic forest association to Pamir in Tajikistan (Middle Asia)
2015
Abstract The floristic structure, distribution and habitat requirements of a forest syntaxon, Populetum pamiricae ass. nova is described. The potential range of the Populetum pamiricae association comprises the mountains of eastern Tajikistan (Pamir Alai Mts), Kashgaria in western China (Kunlun Shan Mts) and north-eastern Afghanistan (Hindu Kush Mts) in Middle Asia. The biotope of this community comprises of high mountain river valleys situated at elevations between 2,500 and 3,200 m above sea level. Phytocoenoses of the Populetum pamiricae association are characterized by the apparent domination in the tree layer of a diagnostic species, Populus pamirica. The tree stand has a mean cover ar…
Dynamics of Non Classically Reproducible Entanglement
2008
We investigate when the quantum correlations of a bipartite system, under the influence of environments with memory, are not reproducible with certainty by a classical local hidden variable model. To this purpose, we compare the dynamics of a Bell inequality with that of entanglement, as measured by concurrence. We find time regions when Bell inequality is not violated even in correspondence to high values of concurrence (up to $\approx 0.8$). We also suggest that these results may be observed by adopting a modification of a recent experimental optical setup. These findings indicate that even highly entangled systems cannot be exploited with certainty in contexts where the non classical rep…
CP symmetry and thermal effects on Dirac bi-spinor spin–parity local correlations
2018
Intrinsic quantum correlations supported by the $SU(2)\otimes SU(2)$ structure of the Dirac equation used to describe particle/antiparticle states, optical ion traps and bilayer graphene are investigated and connected to the description of local properties of Dirac bi-spinors. For quantum states driven by Dirac-like Hamiltonians, quantum entanglement and geometric discord between spin and parity degrees of freedom - sometimes mapped into equivalent low energy internal degrees of freedom - are obtained. Such \textit{spin-parity} quantum correlations and the corresponding nonlocal intrinsic structures of bi-spinor fermionic states can be classified in order to relate quantum observables to th…
Conductas de riesgo y actitudes relacionadas con la infección por vih/sida en hsh
2014
Abstract:The aim of this investigation is to analyze sexual risk behaviors and attitudes for HIV/AIDS infection of MSM. The ENSI was administrated to 202 men, 168 homosexuals and 24 bisexuals, from 14 to 57 years. The results show a high confidence in condoms as a method of HIV prevention (75.7% very effective and 28.1% effective); however the systematic use of a condom is moderate in anal intercourse (54.64%) and in vaginal intercourse (49.05%) and very low in oral sex (6.22%). There is a low perceived probability (20.28%) and moderate fear (41.25%) become infected with HIV. 20.3% report having drunk alcohol in the last relationship and 5.4% say other drugs. These results should be conside…